An integrated soil respiration and community photosynthesis measurement system and method

Abstract

The application discloses a kind of integrated soil respiration and community photosynthesis measurement system, comprising: device ontology, device ontology is connected with tablet computer communication, device ontology includes the bottom, support, cabin and dynamic pressure balancing device sequentially arranged from bottom to top, automatic soil respiration chamber is arranged in the inside of support, and a kind of integrated soil respiration and community photosynthesis measurement method is also disclosed, the application method of the above-mentioned system, the application is suitable for soil detection technical field, soil gas collection device and gas analysis device are integrated into one, form integrated full-automatic soil respiration and community photosynthesis measurement system;Soil detection is simpler, more convenient, faster;Tablet computer shows test data in real time by friendly man-machine interface, remote monitoring, improve production efficiency.

Description

Technical Field

[0001] This invention belongs to the field of soil testing technology, specifically an integrated soil respiration and community photosynthesis measurement system and method. Background Technology

[0002] Soil respiration refers to the process by which soil releases carbon dioxide, much like human respiration. The respiration of soil microorganisms, crops, crop roots, and soil animals all release significant amounts of carbon dioxide. Currently, soil respiration is the largest source of carbon dioxide release into the atmosphere from terrestrial ecosystems. Furthermore, even relatively small changes in the rate of soil respiration can significantly alter the concentration of carbon dioxide in the atmosphere and the rate of soil carbon accumulation, thereby exacerbating or mitigating global warming. Therefore, providing quantitative measurement techniques and accurate data on soil respiration is urgently needed by the scientific community.

[0003] Existing portable soil respiration measurement systems generally employ a scheme where, during field testing of soil respiration, the device for collecting soil gases and the device for analyzing soil gases are separate. The disadvantage of this approach is:

[0004] The equipment for collecting and analyzing soil gases cannot be integrated into a single device, as it is inconvenient to carry and requires complicated and time-consuming installation procedures. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide an integrated soil respiration and community photosynthesis measurement system and method.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] In a first aspect, an integrated soil respiration and community photosynthesis measurement system includes: a device body, the device body being communicatively connected to a tablet computer, the device body including a base, a support, a cabin and a dynamic pressure balancing device arranged sequentially from bottom to top, and an automatic soil respiration chamber being provided inside the support.

[0008] The dynamic pressure balancing device includes an air chamber, and a connecting pipe is connected to the air vent at the bottom of the air chamber. A pressure balancing hollow guide shaft is connected to the end of the connecting pipe.

[0009] The main control board is installed inside the cabin and is fixed to the mounting plate on the cabin shell; the miniature gas circulation pump and the lithium battery are respectively fixed to the side panel of the cabin shell; the two-position five-way solenoid valve, the main air pump, and the cylinder driver are all fixed to the mounting plate on the lower part of the cabin shell.

[0010] The automatic soil breathing chamber includes a breathing chamber, which is connected to the piston rod of the cylinder driver. The piston rod can drive the automatic soil breathing chamber to move up and down reciprocatingly.

[0011] The breathing chamber is equipped with an air intake hollow guide shaft, an air outlet hollow guide shaft, a pressure balance hollow guide shaft, and an air temperature measurement hollow guide shaft. All four hollow guide shafts are fixedly connected to the breathing chamber, and as the breathing chamber moves up and down, the four hollow guide shafts slide up and down within the cabin.

[0012] Preferably, the air chamber consists of upper and lower end caps, which are connected by a connecting shaft threaded together. The gap between the upper and lower end caps is greater than the distance from the end face of the vent to the upper cap. Two vents are provided on the air chamber. Airflow enters from the first vent and exits from the second vent after entering the air chamber. The connecting pipe is a flexible air guide that is snapped into the vent and the other end is snapped into the pressure-balancing hollow guide shaft. The pressure-balancing hollow guide shaft is threadedly connected to the breathing chamber, so that the pressure on the soil surface inside the breathing chamber is the same as the external pressure.

[0013] Preferably, the main control board is equipped with a CO2 and H2O analysis unit, an air temperature measurement unit, a soil temperature measurement unit, a soil moisture measurement unit, WiFi wireless communication, an embedded atmospheric pressure sensor, a TF card, and a Beidou positioning device.

[0014] Preferably, handles are rotatably provided on both sides of the cabin, and the two handles are connected by a lifting handle, which can rotate around the axis connecting the handle and the cabin for holding and carrying.

[0015] Preferably, the hollow air temperature measuring guide shaft has a connecting wire inside, one end of which is connected to the air temperature sensor in the breathing chamber, and the other end is connected to the main control board. The temperature data of the air temperature sensor in the breathing chamber is transmitted to the main control board and displayed on the tablet computer via WiFi wireless communication.

[0016] Preferably, the breathing chamber is equipped with an adjustable light source and a light intensity sensor. The light intensity and different light ratios of the adjustable light source can be adjusted. The light intensity sensor is used to track and monitor the light intensity in the breathing chamber. The adjustable light source is located at the top of the breathing chamber and is surrounded by an isolation cover.

[0017] Preferably, the adjustable light source is a red-blue LED cold light source, and the red light intensity range of the adjustable light source is 0 μmol / m². 2 / s~2000μmol / m 2 / s, the blue light intensity range of the tunable light source is 0 μmol / m 2 / s~500μmol / m 2 / s.

[0018] Preferably, the adjustable light source is a red-green-blue-white LED cold light source, and the red light intensity range of the adjustable light source is 0 μmol / m². 2 / s~2400μmol / m 2 / s, the green light intensity range of the tunable light source is 0 μmol / m 2 / s~1000μmol / m 2 / s, the blue light intensity range of the tunable light source is 0 μmol / m 2 / s~2000μmol / m 2 / s, white light intensity range of tunable light source: 0 μmol / m 2 / s~1500μmol / m 2 / s.

[0019] Preferably, the external LED light source outside the breathing chamber is a beacon-like indicative light source for positioning.

[0020] Secondly, an integrated method for measuring soil respiration and community photosynthesis includes the following steps:

[0021] S1 determines the location for soil layer measurement, a soil ring is buried at the location for soil layer measurement, and the device body is placed on the soil ring. The base of the device body and the surface of the soil ring form a closed space.

[0022] S2 tablet computer remotely controls the breathing chamber: The main control board in the cabin drives the micro gas circulation pump to work and the two-position five-way solenoid valve to close and open; the two-position five-way solenoid valve controls the movement direction of the piston of the cylinder driver, which drives the breathing chamber to rise and fall; the gas released from the soil enters the CO2 and H2O analysis unit through the air pipe from the inlet hollow guide shaft, and then flows into the outlet hollow guide shaft through the air pipe to form a closed-loop gas circulation.

[0023] The S3 analyzes various gas detection data, including soil temperature, humidity, CO2 and H2O content in the gas, and air temperature parameters, through the various test units on the main control board, and displays them on a tablet computer via WiFi.

[0024] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0025] In this invention, the soil gas collection device and the gas analysis device are integrated into one unit to form an integrated fully automatic soil respiration and community photosynthesis measurement system; soil testing is simpler, more convenient, and faster; the tablet computer displays test data in real time through a user-friendly human-machine interface and enables remote monitoring, thereby improving production efficiency. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the external connections of the integrated soil respiration and community photosynthesis measurement system in this invention.

[0027] Figure 2 This is a schematic diagram of the integrated soil respiration and community photosynthesis measurement system of the present invention;

[0028] Figure 3 This is a schematic diagram of the dynamic pressure balance structure in this invention;

[0029] Figure 4 This is a schematic diagram of the front panel of the cabin in this invention;

[0030] Figure 5 This is a schematic diagram of the cabin reverse panel in this invention;

[0031] Figure 6 This is a schematic diagram of the components mounted on the main control board in this invention;

[0032] Figure 7 This is a schematic diagram of the air passage inside the cabin in this invention;

[0033] Figure 8 This is a schematic diagram of the automatic soil breathing chamber structure in this invention.

[0034] Reference numerals: 100, device body;

[0035] 10. Dynamic pressure balancing device; 10-1. Air chamber; 10-2. Air vent; 10-3. Connecting pipe; 10-4. Pressure balancing hollow guide shaft;

[0036] 20. Cabin; 20-1. Main Control Board; 20-2. Miniature Gas Circulation Pump; 20-3. Lithium Battery; 20-4. Two-Position Five-Way Solenoid Valve; 20-5. Main Air Pump; 20-6. Cylinder Driver; 20-7. Soil Temperature Connector; 20-8. Soil Moisture Connector; 20-9. Air Inlet; 20-10. Air Outlet; 20-11. CHG, External Analyzer Interface; 20-1-1. CO2, H2O Analysis Unit; 20-1-2. Air Temperature Measurement Unit; 20-1-3. Soil Temperature Measurement Unit; 20-1-4. Soil Moisture Measurement Unit; 20-1-5. WiFi Wireless Communication; 20-1-6. Embedded Atmospheric Pressure Sensor; 20-1-7. TF Card; 20-1-8. Beidou Positioner;

[0037] 30. Automatic soil breathing chamber; 30-1 Breathing chamber; 30-2. Hollow air inlet guide shaft; 30-3. Hollow air outlet guide shaft; 30-4. Hollow air temperature measuring guide shaft; 30-5. Adjustable light source; 30-6. Isolation cover; 30-7. Light intensity sensor; 30-8. LED light source;

[0038] 40. Handle;

[0039] 50. Handle;

[0040] 60. Bracket;

[0041] 70. Base;

[0042] 200: Tablet PC. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1-8 This invention further illustrates specific embodiments of an integrated soil respiration and community photosynthesis measurement system and method. The integrated soil respiration and community photosynthesis measurement system and method of this invention are not limited to the descriptions in the following embodiments.

[0044] Example 1:

[0045] This embodiment provides a specific implementation of an integrated soil respiration and community photosynthesis measurement system, such as... Figure 1-8 As shown, it includes: device body 100, device body 100 is connected to tablet computer 200 for communication, device body 100 includes base 70, bracket 60, cabin 20 and dynamic pressure balancing device 10 arranged sequentially from bottom to top, and automatic soil breathing chamber 30 is provided inside the bracket 60.

[0046] The dynamic pressure balancing device 10 includes an air chamber 10-1, a connecting pipe 10-3 is connected to the air vent 10-2 at the bottom of the air chamber 10-1, and a pressure balancing hollow guide shaft 10-4 is connected to the end of the connecting pipe 10-3.

[0047] The main control board 20-1 is installed inside the cabin 20 and is fixed to the mounting plate on the cabin shell; the micro gas circulation pump 20-2 and the lithium battery 20-3 are respectively fixed to the side panel of the cabin shell; the two-position five-way solenoid valve 20-4, the main air pump 20-5, and the cylinder driver 20-6 are all fixed to the lower mounting plate of the cabin shell.

[0048] The automatic soil breathing chamber 30 includes a breathing chamber 30-1, which is connected to the piston rod of the cylinder driver 20-6. The piston rod can drive the automatic soil breathing chamber 30 to move up and down reciprocally.

[0049] The breathing chamber 30-1 is equipped with an air intake hollow guide shaft 30-2, an air outlet hollow guide shaft 30-3, a pressure balance hollow guide shaft 10-4, and an air temperature measurement hollow guide shaft 30-4. All four hollow guide shafts are fixedly connected to the breathing chamber 30-1. As the breathing chamber 30-1 moves up and down, the four hollow guide shafts slide up and down within the cabin 20.

[0050] Furthermore, the air chamber 10-1 consists of upper and lower end covers, which are connected by a connecting shaft threaded together. The gap between the upper and lower end covers is greater than the distance from the end face of the vent to the upper cover. Two vents are opened on the air chamber. Airflow enters from the first vent and flows out from the second vent after entering the air chamber 10-1. The connecting pipe 10-3 is a flexible air guide that is snapped into the vent 10-2 at one end and into the pressure-balancing hollow guide shaft 10-4 at the other end. The pressure-balancing hollow guide shaft 10-4 is threadedly connected to the breathing chamber 30-1, so that the pressure on the soil surface inside the breathing chamber is the same as the external pressure.

[0051] Furthermore, the main control board 20-1 is equipped with a CO2 and H2O analysis unit 20-1-1, an air temperature measurement unit 20-1-2, a soil temperature measurement unit 20-1-3, a soil moisture measurement unit 20-1-4, a WiFi wireless communication unit 20-1-5, an embedded atmospheric pressure sensor 20-1-6, a TF card 20-1-7, and a Beidou locator 20-1-8.

[0052] Furthermore, handles 50 are rotatably provided on both sides of the cabin 20, and the two handles 50 are connected by a lifting handle 40. The lifting handle 40 can rotate around the axis connecting the handle 50 and the cabin 20 for holding and carrying.

[0053] Furthermore, the hollow air temperature measuring guide shaft 30-4 has a connecting wire. One end of the wire is connected to the air temperature sensor in the breathing chamber 30-1, and the other end is connected to the main control board 20-1. The temperature data of the air temperature sensor in the breathing chamber 30-1 is transmitted to the main control board 20-1 and displayed on the tablet computer 200 via WiFi wireless communication 20-1-5.

[0054] Furthermore, the breathing chamber 30-1 is equipped with an adjustable light source 30-5 and a light intensity sensor 30-7. The light intensity and different light ratios of the adjustable light source 30-5 can be adjusted. The light intensity sensor 30-7 is used to track and monitor the light intensity inside the breathing chamber 30-1. The adjustable light source 30-5 is located at the top inside the breathing chamber 30-1. An isolation cover 30-6 is provided outside the adjustable light source 30-5.

[0055] Furthermore, the adjustable light source 30-5 is a red and blue LED cold light source, and the red light intensity range of the adjustable light source 30-5 is 0 μmol / m². 2 / s~2000μmol / m 2 / s, adjustable light source 30-5 blue light intensity range 0μmol / m 2 / s~500μmol / m 2 / s.

[0056] Furthermore, the adjustable light source 30-5 is a red, green, blue, and white LED cold light source, and the red light intensity range of the adjustable light source 30-5 is 0 μmol / m².2 / s~2400μmol / m 2 / s, adjustable light source 30-5 green light intensity range 0μmol / m 2 / s~1000μmol / m 2 / s, adjustable light source 30-5 blue light intensity range 0μmol / m 2 / s~2000μmol / m 2 / s, adjustable light source 30-5 white light intensity range 0μmol / m 2 / s~1500μmol / m 2 / s.

[0057] Furthermore, the external LED light source 30-8 of the breathing chamber 30-1 serves as a beacon-like indicator light for positioning.

[0058] Furthermore, the main control board 20-1 is equipped with WiFi wireless communication 20-1-5, which interacts with the tablet computer 200. It can display parameters such as CO2, H2O, soil temperature, soil moisture, and air temperature. Through the tablet computer 200, parameters such as xxx can be input, and the start and end times of soil respiration calculation can be set for automatic and manual selection. The calculation can be repeated. Parameters such as xx can be input for manual and automatic control of the raising and lowering of the soil respiration chamber. Repeated measurements of soil respiration can be performed automatically without limit or with a limit.

[0059] Furthermore, the CO2 and H2O analysis unit 20-1-1 mounted on the main control board 20--1 is based on the latest "micro-light source" dual-channel non-scattering infrared (NDIR) technology and adopts factory calibration based on temperature compensation to ensure that the device outputs stable data in various scenarios. One end of the CO2 and H2O analysis unit 20-1-1 is connected to one end of the inlet hollow guide shaft 30-2, and the other end is connected to one end of the micro gas circulation pump 20-2. One end of the micro gas circulation pump 20-2 is connected to the CO2 and H2O analysis unit 20-1-1, and the other end is connected to one end of the outlet hollow guide shaft 30-3, forming a complete circulating gas path.

[0060] Furthermore, the soil temperature measuring connector outside the cabin 20 is used to connect to a soil temperature sensor, and its data is transmitted to the main control board and finally displayed on the tablet computer via WiFi communication; the cabin panel is equipped with a soil moisture measuring connector, which is used to connect to a soil moisture sensor, and its data is transmitted to the main control board and finally displayed on the tablet computer via WiFi communication.

[0061] Furthermore, the external CHG connector and external analyzer connector are compatible with other brands of analyzers.

[0062] Furthermore, the bottom diameter of the breathing chamber is 20cm and the height is 12cm.

[0063] Example 2:

[0064] This embodiment provides a specific implementation method for an integrated method of measuring soil respiration and community photosynthesis, including the following steps:

[0065] S1 determines the soil layer measurement location, buries a soil ring at the soil layer measurement location, places the device body 100 on the soil ring, and the base 70 of the device body 100 and the surface of the soil ring form a closed space.

[0066] S2 tablet PC 200 remotely controls breathing chamber 30-1: The main control board 20-1 inside the cabin 20 drives the micro gas circulation pump 20-2 to work and the two-position five-way solenoid valve 20-4 to close and open; the two-position five-way solenoid valve 20-4 controls the movement direction of the piston of the cylinder driver 20-6, driving the breathing chamber 30-1 to rise and fall; the gas released from the soil enters the CO2 and H2O analysis unit 20-1-1 through the air pipe from the inlet hollow guide shaft 30-2, and then flows into the outlet hollow guide shaft 30-3 through the air pipe to form a closed-loop gas circulation;

[0067] The S3 analyzes various gas detection data, including soil temperature, humidity, CO2 and H2O content in the gas, and air temperature parameters, through the various test units mounted on the main control board 20-1, and displays them on the tablet computer 200 via WiFi.

[0068] Example 3:

[0069] This embodiment provides a specific implementation method for measuring integrated soil respiration and community photosynthesis, such as... Figure 1-8 As shown, an integrated soil respiration and community photosynthesis measurement system includes: a device body 100 and a tablet computer 200. The device body 100 collects soil respiration gases, analyzes CO2 and H2O, and uploads the analysis results to the user's tablet computer 200 via internal WiFi wireless communication. The user can control the device body 100 by inputting commands through the tablet computer 200.

[0070] Furthermore, such as Figure 2As shown, the device body 100 includes: a main control board inside the cabin 20, equipped with CO2, H2O analysis, soil temperature, soil moisture, and air temperature measurement units, integrated with the automatic soil breathing chamber, and equipped with WiFi wireless communication, which allows for control and interaction with the tablet computer 200 via WiFi; the tablet computer 200 can directly input parameters and manually or automatically control the raising and lowering of the soil breathing chamber. During the raising and lowering process, the breathing chamber maintains the internal air pressure equal to the ambient air pressure through the dynamic pressure balancing device 10; the main control board inside the cabin 20 can control the operation of the main air pump, cylinder driver, two-position five-way solenoid valve, and micro gas circulation pump. The cylinder driver drives the automatic soil breathing chamber 30 to move up and down synchronously automatically and repeatedly without limit or with a limited number of times; optional LED light sources can be installed inside and outside the breathing chamber, including a built-in effective photosynthesis light source and an external positioning beacon indicator light source; the cabin panel is equipped with NO / OFF, CHG, soil temperature, and soil moisture measurement connectors; a portable handle 40 is provided on the top of the cabin; and the cabin has a built-in lithium battery 20-3.

[0071] It should be noted that the breathing chamber 30-1 of the automatic soil breathing chamber 30 is expandable and compatible with other brands of analyzers.

[0072] Furthermore, such as Figure 3 As shown, the device body 100 includes a dynamic pressure balancing device 10. The dynamic pressure balancing structure includes an air chamber 10-1, on which a first vent and a second vent are provided. Airflow enters from the first vent or the second vent and exits from the second vent or the first vent after entering the air chamber 10-1. An air vent 10-2 is also provided on the air chamber 10-1. A connecting pipe 10-3 is installed on the air vent 10-2. One end of the connecting pipe 10-3 is connected to the air chamber 10-1 through the air vent 10-2, and the other end of the connecting pipe 10-2 is connected to the pressure balancing hollow guide shaft 10-4.

[0073] It should be noted that the cross-sectional area of ​​the first vent is S1, the cross-sectional area of ​​the second vent is S2, and the cross-sectional area of ​​the air chamber cavity at the vent is S3. The ratio of S1 to S3 ranges from 0.1 to 0.4, and the ratio of S2 to S3 ranges from 0.1 to 0.4.

[0074] By setting up air chamber 10-1 and first and second ventilation openings, and opening ventilation ports, the cross-sectional area of ​​the air chamber at the ventilation port is 2.5 to 10 times the cross-sectional area of ​​the first and second ventilation openings. According to Bernoulli's equation and the law of conservation of mass, under wind conditions, the pressure on the soil surface inside the breathing chamber can be the same as the pressure on the soil surface outside the chamber, thereby simulating the dynamic pressure change caused by natural wind.

[0075] Furthermore, such as Figure 1 , Figure 4 , Figure 5As shown, the device body 100 includes a cabin 20, which includes: a main control board 20-1, a micro gas circulation pump 20-2, a lithium battery 20-3, a two-position five-way solenoid valve 20-4, a main air pump 20-5, a cylinder driver 20-6, a soil temperature connector 20-7, a soil moisture connector 20-8, an air inlet 20-9, an air outlet 20-10, an external power supply 20-11, and an ON / OFF switch.

[0076] Furthermore, such as Figure 5 The main control board inside the cabin 20 shown includes: CO2 and H2O analysis unit 20-1-1, air temperature measurement unit 20-1-2, soil temperature measurement unit 20-1-3, soil moisture measurement unit 20-1-4, WiFi wireless communication 20-1-5, embedded atmospheric pressure sensor 20-1-6, TF card 20-1-7, and Beidou locator 20-1-8.

[0077] Air circuit control within the cabin 20, such as Figure 7 As shown: The air inlet of the main air pump 20-5 is connected to port 1 of the two-position five-way solenoid valve 20-4; port 3 of the two-position five-way solenoid valve 20-4 is connected to port 1 of the cylinder actuator 20-6; and port 2 of the cylinder actuator 20-6 is connected to port 2 of the two-position five-way solenoid valve 20-4. Parameters can be directly input on the tablet computer 200. The WiFi wireless communication on the main control board 20-1 receives the signal. The main control board 20-1 controls the main air pump 20-5 to draw air, and simultaneously, the solenoid valve 20-4 operates, driving the cylinder in the cylinder actuator 20-6 to perform lifting and lowering movements.

[0078] Furthermore, such as Figure 8 As shown, the automatic soil breathing chamber 30 includes: a breathing chamber 30-1, an inlet hollow guide shaft 30-2, an outlet hollow guide shaft 30-3, and an air temperature measuring hollow guide shaft 30-4. The inlet hollow guide shaft 30-2, outlet hollow guide shaft 30-3, air temperature measuring hollow guide shaft 30-4, and pressure balancing hollow guide shaft 10-4 are fixed inside the breathing chamber 30-1. The cylinder in the cylinder actuator 20-6 is connected to and fixed to the breathing chamber 30-1. When the cylinder moves up and down, it drives the automatic soil breathing chamber to move up and down synchronously, automatically and repeatedly, with no limit or a limited number of repetitions.

[0079] Furthermore, such as Figure 8 As shown, the dynamic soil respiration chamber 30 also includes: an adjustable light source 30-5 and a light intensity sensor 30-7 installed inside the chamber. The light intensity and different light ratios of the adjustable light source 30-5 can be adjusted, and the light intensity sensor 30-7 is used to track and monitor the light intensity inside the respiration chamber. The adjustable light source 30-5 is located at the top of the respiration chamber, and an isolation cover 30-6 is installed below the adjustable light source 30-5. The external LED light source 30-8 installed in the respiration chamber is a beacon-like indicative light source used for positioning the soil respiration measurement device.

[0080] It should be noted that in this embodiment, the isolation cover 30-6 is used to mix the light intensity, and it can be made of glass or acrylic material with high transmittance.

[0081] Furthermore, the adjustable light source 30-5 is a red and blue LED cold light source, and the red light intensity range of the adjustable light source 30-5 is 0 μmol / m². 2 / s~2000μmol / m 2 / s, adjustable light source 30-5 blue light intensity range 0μmol / m 2 / s~500μmol / m 2 / s.

[0082] According to the above scheme, further, the adjustable light source 30-5 in this embodiment of the invention is a red-green-blue-white LED cold light source, and the red light intensity range of the adjustable light source 30-5 is 0 μmol / m². 2 / s~2400μmol / m 2 / s, adjustable light source 30-5 green light intensity range 0μmol / m 2 / s~1000μmol / m 2 / s, adjustable light source 30-5 blue light intensity range 0μmol / m 2 / s~2000μmol / m 2 / s, adjustable light source 30-5 white light intensity range 0μmol / m 2 / s~1500μmol / m 2 / s.

[0083] It should be noted that, in this embodiment, the adjustable light source 30-5 can be a planar LED light source, such as... Figure 4 As shown, other shapes are also possible, but no specific limitations are made here.

[0084] In this embodiment, the isolation cover 30-6 positioned below the adjustable light source 30-5 enhances the uniformity of light, isolates the adjustable light source from the air passage and sensor probe within the breathing chamber, and provides excellent sealing to prevent moisture and insects from affecting the adjustable light source. Additionally, the built-in light intensity sensor 30-7 is located approximately 1 cm below the isolation cover 30-6.

[0085] In this embodiment of the invention, the adjustable light source is a cold light source, which can track changes in external light intensity and adjust the changes in light inside the respiratory chamber. It can also set the light intensity for corresponding time points according to different seasons, longitudes, and latitudes to perform photosynthetic measurements of lit communities. Because it is a cold light source, the warming effect is eliminated. Specifically, the user can customize the pattern of light intensity change over time within the leaf chamber, which can be a fixed intensity and ratio.

[0086] In this embodiment of the invention, the respiration chamber of the soil respiration measurement device is equipped with a light source whose intensity and proportion can be artificially adjusted, resulting in a highly homogeneous light field on the leaves. In this embodiment, the adjustable light source is primarily a cold light source. Based on the needs of plant growth, while maintaining a constant total number of photons required for effective photosynthesis, an LED artificial light source with an adjustable red-blue photon ratio can be used to provide 0 μmol / m³ of light. 2 / s~2000μmol / m 2 The system provides illumination with a light intensity of / s, featuring typical peak values ​​and spectral widths for blue, red, and far-red LEDs. The built-in light intensity sensor allows for setting the blue light channel (450±15)nm, the red light channel (660±20)nm, and the far-red light channel (735±20)nm to measure the quantum flux density of blue, red, and far-red light respectively, providing real-time feedback for controlling the illumination of the leaf chamber. The red light intensity range is 0 μmol / m². 2 / s~2000μmol / m 2 / s and blue light (light intensity range 0 μmol / m 2 / s~500μmol / m 2 The light source (red light) can be individually controlled. Red light is the energy source, while blue light adjusts the movement of the pores. By adjusting the current value of different light sources, the ratio of red to blue light can be adjusted within a certain range, ensuring stable light radiation per unit area. Alternatively, red, green, blue, and white light sources can be used, providing red, green, blue, and white light (with maximum light intensities reaching 2400, 1000, 2000, and 1500 μmol / m², respectively). 2 The light field of the light source is highly homogeneous due to the arbitrary mixing of light sources in proportions of / s.

[0087] Plant growth typically requires a basic number of photons per unit area for effective photosynthesis, and the required ratio of red to blue light intensity varies at different growth stages. The light source design system mainly consists of a light intensity sensor, an adjustable light source, a controller, and control circuitry, with integrated control software within the controller. Based on requirements, target PPFD values ​​for different wavelength bands (or a total target PPFD value and light quality ratio) are set in the control software. The light intensity sensor, placed in the working area, transmits the measured PPFD values ​​for the corresponding wavelength bands to the controller. The controller compares the target value and the measured value; if they are not equal, it automatically adjusts the PPFD of the corresponding wavelength band until the measured value equals the target value. In this embodiment, the light intensity sensor provides accurate and continuous measurements both indoors and outdoors, offering excellent directional (cosine) response for continuous outdoor or indoor installation or portable field use, and is easy to clean. Leveling is easily achieved by adjusting the screws on the fixed flange using a bubble level. The sensor comes with a 5-meter cable, with a 15-meter cable optional. An amplifier is included, providing a standard Adcon analog output signal from 0 to 2.5V. The sensor has a spectral range of 400 nm to 700 nm and a sensitivity of 10 μmol / m. 2 / s~50μmol / m 2 / s, resistance value 240Ω, signal output range (0-3000μmol / m) 2 / s) is 0~30mV / 0-2.5V.

[0088] Furthermore, the measurement process of the soil respiration measurement system involves first turning on the adjustable light source to perform a measurement under light, and then turning off the adjustable light source to perform a measurement under darkness. It should be noted that a complete soil respiration measurement process in this embodiment of the invention has strict sequential requirements; the measurement under light must be performed first, followed by the measurement under darkness. If the measurement under darkness is performed first, the subsequent measurement under light will be inaccurate.

[0089] The soil respiration measurement system of this invention first turns on the adjustable light source to perform a photoluminescent community photosynthesis measurement; then turns off the light source and performs a photoluminescent community photosynthesis measurement, which is similar to traditional dark soil respiration. The measurement results can well represent the net respiration rate of soil and plants in a real ecosystem.

[0090] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. An integrated soil respiration and community photosynthesis measurement system, characterized in that, include: The device body (100) is connected to the tablet computer (200) for communication. The device body (100) includes a base (70), a bracket (60), a cabin (20) and a dynamic pressure balancing device (10) arranged sequentially from bottom to top. An automatic soil breathing chamber (30) is provided inside the bracket (60). The dynamic pressure balancing device (10) includes an air chamber (10-1), and a connecting pipe (10-3) is connected to the air inlet (10-2) at the bottom of the air chamber (10-1). A pressure balancing hollow guide shaft (10-4) is connected to the end of the connecting pipe (10-3). The main control board (20-1) is installed inside the cabin (20), and the main control board (20-1) is fixed to the mounting plate on the cabin shell; the micro gas circulation pump (20-2) and the lithium battery (20-3) are respectively fixed to the side panel of the cabin shell; the two-position five-way solenoid valve (20-4), the main air pump (20-5), and the cylinder driver (20-6) are all fixed to the lower mounting plate of the cabin shell; The automatic soil breathing chamber (30) includes a breathing chamber (30-1), which is connected to the piston rod of the cylinder driver (20-6). The piston rod can drive the automatic soil breathing chamber (30) to move up and down reciprocally. The breathing chamber (30-1) is interspersed with an air intake hollow guide shaft (30-2), an air outlet hollow guide shaft (30-3), a pressure balance hollow guide shaft (10-4), and an air temperature measurement hollow guide shaft (30-4). All four hollow guide shafts are fixedly connected to the breathing chamber (30-1). As the breathing chamber (30-1) moves up and down, the four hollow guide shafts slide up and down within the cabin (20). The air chamber (10-1) consists of upper and lower end caps, which are connected by a threaded connecting shaft. The gap between the upper and lower end caps is greater than the distance from the end face of the vent to the upper cap. Two vents are provided on the air chamber. Airflow enters from the first vent and flows out from the second vent after entering the air chamber (10-1). The connecting pipe (10-3) is a flexible air guide that is connected to the vent (10-2) at one end and to the pressure-balancing hollow guide shaft (10-4) at the other end. The pressure-balancing hollow guide shaft (10-4) is threadedly connected to the breathing chamber (30-1) to achieve the same pressure on the soil surface inside the breathing chamber as the external pressure. The main control board (20-1) is equipped with a CO2 and H2O analysis unit (20-1-1), an air temperature measurement unit (20-1-2), a soil temperature measurement unit (20-1-3), a soil moisture measurement unit (20-1-4), a WiFi wireless communication unit (20-1-5), an embedded atmospheric pressure sensor (20-1-6), a TF card (20-1-7), and a Beidou locator (20-1-8). The breathing chamber (30-1) is equipped with an adjustable light source (30-5) and a light intensity sensor (30-7). The light intensity and different light ratios of the adjustable light source (30-5) can be adjusted. The light intensity sensor (30-7) is used to track and monitor the light intensity inside the breathing chamber (30-1). The adjustable light source (30-5) is located at the top inside the breathing chamber (30-1). An isolation cover (30-6) is provided outside the adjustable light source (30-5). The adjustable light source (30-5) is a red and blue LED cold light source, and the red light intensity range of the adjustable light source (30-5) is 0 μmol / m². 2 / s~2000μmol / m 2 / s, the blue light intensity range of the tunable light source (30-5) is 0 μmol / m 2 / s~500μmol / m 2 / s; The adjustable light source (30-5) is a red, green, blue, and white LED cold light source, and the red light intensity range of the adjustable light source (30-5) is 0 μmol / m². 2 / s~2400μmol / m 2 / s, the green light intensity range of the tunable light source (30-5) is 0 μmol / m 2 / s~1000μmol / m 2 / s, the blue light intensity range of the tunable light source (30-5) is 0 μmol / m 2 / s~2000μmol / m 2 / s, white light intensity range of tunable light source (30-5) 0μmol / m 2 / s~1500μmol / m 2 / s.

2. The integrated soil respiration and community photosynthesis measurement system as described in claim 1, characterized in that: The cabin (20) is provided with handles (50) on both sides. The two handles (50) are connected by a handle (40). The handle (40) can rotate around the axis connecting the handle (50) and the cabin (20) for holding and carrying.

3. The integrated soil respiration and community photosynthesis measurement system as described in claim 1, characterized in that: The hollow air temperature measuring guide shaft (30-4) has a connecting wire. One end of the connecting wire is connected to the air temperature sensor of the breathing chamber (30-1), and the other end is connected to the main control board (20-1). The temperature data of the air temperature sensor of the breathing chamber (30-1) is transmitted to the main control board (20-1) and displayed on the tablet computer (200) via WiFi wireless communication (20-1-5).

4. The integrated soil respiration and community photosynthesis measurement system as described in claim 1, characterized in that: The external LED light source (30-8) of the breathing chamber (30-1) is a beacon-like indicator light source for positioning.

5. An integrated method for measuring soil respiration and community photosynthesis, characterized in that, Includes the following steps: S1 determines the soil layer measurement location, buries a soil ring at the soil layer measurement location, places the device body (100) on the soil ring, and the base (70) of the device body (100) and the surface of the soil ring form a closed space. The S2 tablet (200) remotely controls the breathing chamber (30-1): the main control board (20-1) in the cabin (20) drives the micro gas circulation pump (20-2) to work and the two-position five-way solenoid valve (20-4) to close and open; the two-position five-way solenoid valve (20-4) controls the direction of piston movement of the cylinder driver (20-6), which drives the breathing chamber (30-1) to rise and fall; the gas released from the soil enters the CO2 and H2O analysis unit (20-1-1) through the air pipe from the inlet hollow guide shaft (30-2) and then flows into the outlet hollow guide shaft (30-3) through the air pipe to form a closed-loop gas circulation; The S3 analyzes various gas detection data, including soil temperature, humidity, CO2 and H2O content in the gas, and air temperature parameters, through the test units mounted on the main control board (20-1), and displays them on the tablet computer (200) via WiFi.

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